Fluid flow tube



FIG. 1 depicts a front perspective view of the claimed design of a fluid flow tube;

FIG. 2 depicts a top view of the fluid flow tube of FIG. 1;

FIG. 3 depicts a left side view of the fluid flow tube of FIG. 1;

FIG. 4 depicts a right side view of the fluid flow tube of FIG. 1;

FIG. 5 depicts a rear end view of the fluid flow tube of FIG. 1;

FIG. 6 depicts a front end view of the fluid flow tube of FIG. 1; and,

FIG. 7 depicts a bottom view of the fluid flow tube of FIG. 1.

The dashed broken lines in the drawings depict portions of the article and environment that form no part of the claim. 

CLAIM We claim the ornamental design for a fluid flow tube, as shown and described. 